13. RHP Joel Hanrahan, Pittsburgh Pirates

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Joel Hanrahan isn't the 13th worst reliever on this list by any means.

His numbers (28/29 save opportunities, 1.24 ERA, 0.92 WHIP, 1.65 BB/9) are among the best any of any reliever in baseball. His rejuvenated fastball (97.2 MPH on average) has turned Hanrahan into a legitimate lights out closer.

In normal situations, this would be an easy sell for the Pittsburgh Pirates, perennial cellar-dwellars of the NL Central.

But the Pirates are currently 51-45 (.531), a record which is good enough to tie them with the Milwaukee Brewers for the division lead.

Forget finishing over .500 (which hasn't been accomplished in Pittsburgh since 1992); the Pirates have their eyes set on a division title.

Teams are going to call on Hanrahan, but the Pirates wouldn't likely budge for anything other than a blue-chip prospect

11. RHP Frank Francisco, Toronto Blue Jays

Frank Francisco was traded from the Texas Rangers to the Toronto Blue Jays in exchange for power-hitting catcher Mike Napoli this offseason.

After missing the early part of the season, Francisco hasn't been all that great: 5.53 ERA, 1.73 WHIP, 2.29 SO/BB rate.

With Jon Rauch and Octavio Dotel in the fold long term, a struggling Francisco (a FA at the end of the year) doesn't offer much for the Blue Jays.

In the past, Francisco has had success closing games and pitching in the back end of a bullpen. There may be a team or two willing to take a chance on Francisco in the hopes that he turns it around for the stretch run.

8. RHP Kyle Farnsworth, Tampa Bay Rays

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The Tampa Bay Rays are currently 7.5 games off the division leading Boston Red Sox. Despite their strong play (52-45, .536) their chances of making the playoffs out of the AL East are slim, especially with an ailing Evan Longoria.

The cost-concious Rays are likely to listen to offers for the majority of their players at the deadline, and Farnsworth has one of the best chances of being moved.

He's defied most expectations this season, posting a 1.86 ERA and a 0.96 WHIP in 38.2 innings of work.

Farnsworth throws hard (95.6 MPH average fastball), and while he probably wouldn't retain his closers role in a trade, he could be a late inning impact bullpen arm for a contender.

7. LHP Sean Marshall, Chicago Cubs

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Buster Olney of ESPN recently tweeted that the Cubs have no interest in trading Sean Marshall.

But, with a paper thin market for left-handed relievers, teams are still going to call anyways. Marshall has been great this year, posting a 3.18 ERA and a 1.19 WHIP while appearing in 45 games and 45.1 innings of work.

He's cut his walks down to a career best 2.0 BB/9, more than a walk per game fewer than his career average.

Marshall is also signed for just $3.1 million in 2012.

The Cubs have said they don't want to move him, and they probably won't unless a team makes them a very strong offer. I

f the Cubbies were offered a legitimate prospect in return for Marshall, it would be hard to envision them saying no given all their struggles as an organization.